The problem reads as follows: A runner of mass m=36 kg and running at 2.9 m/s runs and jumps on the rim of a playground merry-go-round which has a moment of inertia of 404 kgm^2 and a radius of 2 m. Assuming the merry-go-round is initially at rest, what is its final angular velocity to three decimal places? According to the back of the book, the answer is 0.381 rad/s; however, I can never come up with that answer. I have tried the following formulas with no luck: mvr = Iw 1/2mv^2 = 1/2Iw^2 (until I realized kinetic energy would not be conserved.) I know it has something to do with conservation of angular momentum; however, I cannot seem to figure out the angular momentum of the runner before he jumps onto the merry-go-round. Any help would be greatly appreciated.